Effects of Sulfurization Pressure on the Conversion Efficiency of Cosputtered Cu₂ZnSnS₄ Thin Film Solar Cells

Figure 1

Surface (left) and cross section (right) SEM images of CZTS thin films sulfurized at (a) 780 Torr, (b) 760 Torr, (c) 730 Torr, (d) 700 Torr, and (e) 670 Torr in H₂S gas atmosphere at 550°C.

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